Canon double system Super 8 sound movie cameras

Canon made special versions of the Canon 814 and Canon Autozoom 518 cameras that
were compatible with Bell and Howell Filmosound cassette recorders and projectors.
You can identify these cameras by their twin jacks marked "Sound". These jacks
are on the back of the Canon 814 and the left side of the Canon Autozoom 518. You can download
a high-resolution scan of the entire Canon Filmosound sound movie camera manual
(1.8MB file).